Buhler is a city in Reno County, Kansas, United States. As of the 2020 census, the population of the city was 1,325. The first post office in B…Buhler is a city in Reno County, Kansas, United States. As of the 2020 census, the population of the city was 1,325. The first post office in Buhler was established in 1888. Buhler was primarily inhabited by Mennonite families that had emigrated from Russia during the 1880s.